Improvement in hoisting apparatus



O. S. PRESBREY. Hoisting-Apparatus.

No. 207,681.- Patented Sept. 3; I878.

WITNESSES d-wy/d 6425/ M070 ATTORNEYS.

UNITED STATES" PATENT OFF-ICE.

omvnn s. rnnsnnnv, on ronrnnnnv, new YORK.

IMPROVEMENT IN HOISTING APPARATUS.

Specification forming part of Letters Patent No. 207,681, datedSeptember 3, 1878fapplication filed July 18, 1878.

To all whom it may concern:

Be it known that I, OLIVER S. Pnnsmznv, of Port Henry, in the county ofEssex and State of New York, have invented a new and useful Improvementin Hoisting Apparatus, of which the following is a specification:

My invention relates to an apparatus which may be used for hoistingpurposes in various situations, but is more particularly intended. foruse in mines and quarries and in other situations where a number ofdrums are employed at the same time and for the same kind of work.

The invention consists in a novel construction, arrangement, andcombination, with a drum or drums and a driving-shaft, of a system ofgearing, sleeves, and frictionsurfaces, whereby provision is made foroperating a number of drums from a single shaft and for readily andquickly throwing the parts in and out of gear.

The accompanying drawing represents the manner of carrying out myinvention.

Figure 1 is a top view, showing my improvements applied to a singledrum. Fig. 2 is a side view of the same, partly in section, through theline :0 00 of Fig. 1. Fig. 3 is a transverse section taken in the line 3y of Fig. 1.

Similar letters of reference indicate corresponding parts.

A represents a hoisting-drum of ordinary construction, carrying at oneend a gearwheel, B.

0 represents a driving-shaft, receiving motion from a steam-engine orother primitive power. This shaft may be long enough to drive a numberof drums, but the single drum here shown is deemed sufficient forillustration, and the invention will be described with reference to asingle drum.

The drum A receives motion from a carwheel, D, meshing into the wheel B.This gearwheel D is attached to and carried by a sleeve, E, journaled inbearings ff, independent of the shaft 0; but said shaft passes throughsaid sleeve, and is free to turn and to slide therein and independentlythereof. At the extreme end of the sleeve E, farthest from thegear-wheel D, is an enlarged part, having a concave surface, which formsone half of a friction-clutch. Immediately adjoining the sleeve E, onthe shaft 0, is another sleeve, J, carrying at one end a convex surface,H, which forms the other half of the friction-clutch. Thebearing-surfaces of the clutch may be of any suitable form. The sleeve Jslides freely on the shaft 0 longitudinally thereof, but is arranged toturn therewith by means of a groove, t, in the sleeve engaging with afeather, c, on the shaft. Surrounding the sleeve J is a loose collar, K,to which is connected, by means of trunnion-like pivots, a forked lever,L, the lower end of which is pivoted in a block or standard, M, on thebase or platform which supports the parts. The collar K is arranged toslide on the sleeve J and to bear against the shoulder or rear side ofthe part H of the clutch when the lever L is moved in the properdirection.

The parts being in the positions shown in the drawing, the shaft 0revolves freely without turning the gear-wheel D but, by moving thelever L toward the left-hand side of Fig. 2 of the drawing, the collar Kthrows the part H of the clutch into engagement with the part G, causingthe sleeve E to revolve with the shaft 0 and the gear-wheel D to givemotion to the drum A through the gear-wheel B.

By this construction and arrangement of parts any suitable number ofdrums maybe operated from a single shaft, and each drum will workindependent of all the others.

This invention will be of peculiar advantage in mines and quarries andother situations where a number of hoisting-drums is required, and wherean engine is kept running continuously for the purpose of compressingair and for other purposes. I

The drum A is provided with a brake mechanism, which may be of anysuitable descrip tion. The mechanism here shown consists of an elasticmetallic strap or flat bar, 1?, having one end fixed to the base orplatform and the other end passing around the drum, and connected by arod, R, with one arm of a bellcrank lever, S, the rod R passing througha slot in the strap near its fixed end. The other end of the lever S isconnected by a rod, T, with a hand-lever, V, having its lower endpivoted in the block or standard M near the lever L. By this arrangementboth levers are placed within convenient reach of the attend- 2. Thecombination, with the drum A, of the brake mechanism, consisting of thestrap or fiat bar 1?, rod B, bell-crank lever S, rod T, and hand-leverV, when arranged as shown and described.

OLIVER STETSON PRESBREY.

Witnesses:

CARLTON H. MERRITT, WILLIAM H. CARR.

